I want to have opportunity to disable RadExpander header because I want to programmatically expand or collapse RadExpander control.

With the release of the Fluent theme, it would be nice to have a Hamburger Menu control similar to the NavigationView for UWP (https://docs.microsoft.com/en-us/windows/uwp/design/controls-and-patterns/navigationview).

with windows10/2k DPI/14 inch screen ,when show the gridview gridline,the line is different.
     the other things,when the tabitem is selected,the dropdownmenu can't mark the selected item.
   look the attach files!

I know the Transitioncontrol  have the MotionBlurredZoomTransition, the effect is better for image ,but not UI content,especially when the UI use the simple color,the MotionBlurredZoomTransition effect is weak,I find the RadCalendar control with the cool zoom animation,How to realize?
     the other question:How to realize the book turning animation with the Transitioncontrol  ?

https://www.telerik.com/forums/printing-3559585fdb4e
https://www.telerik.com/forums/print-bb34c69c1e37
https://www.telerik.com/forums/printing-rasscheduleview-mvvm

css style like the background color for the pinned rows can be different from the rows in the grid to differentiate the rows

CartesianCustomLineAnnotation should allow for rendering options (2D, Bitmap, default) to allow for a consistent visual appearance.

This is a MVVM helper that could be used to decrease the coupling between the view models.

We provide such properties in our Green theme and they make customizing the read only states of all controls easier.
Currently the read only state looks like disabled and there is no easy way to change it. 

Available in LIB version 2018.1.312.

It would be nice if the Telerik UI for WPF VSExtensions detected usage of UI for WPF in class libraries (e.g. a WPF UserControl Library)..

This would allow the Upgrade Wizard / configure Project wizards can also work on the class libraries, too.

Enable the customers to create and modify .pptx (PowerPoint) files . They need processing as well as showing such documents.

Improve the support for async operations. Currently, if the db data context is shared between the collection and another consumer, issues could occur.

When new product features are released it would be useful to show a short introduction for users.  View introjs.com to see a similar solution for web development

I know you added a sample (https://github.com/telerik/xaml-sdk/tree/master/Buttons/ToggleSwitchButton) but please include this in all your Theming dll.

Add a property to the RadWindow, to enable a behavior, so that when the user attempts to focus on the parent window (while the modal is open), the modal window will flash.

You can see this behavior in other Windows applications that show modal dialogs.

Currently if a column is bound to a field of type DateTimeOffSet it is not displayed using the culture like DateTime is. It would be nice if this is supported in the future

Make the internal static class Telerik.Windows.Controls.WeakEventHandlerManager public.

In Excel it's easy to rotate the contents of a cell. In the Gridview, it's possible to rotate the contents of the header, but the result is a column header that resizes weirdly, and the workaround (at least the one I was provided) is clunky. How about a simple property like <telerik:GridViewDataColumn Header="Name" HeaderRotation="-90" />